import java.util.ArrayList;
import java.util.List;

public class Test2 {
    public static void func(String str1,String str2) {
        List<Character> list=new ArrayList<>();
        for (int i = 0; i < str1.length(); i++) {
            char ch=str1.charAt(i);
            if(!str2.contains(ch+"")) {
                list.add(ch);
            }
        }
//        System.out.println(list);
        for(char ch:list) {
            System.out.print(ch+" ");
        }
        System.out.println();
    }
    public static void main(String[] args) {
        func("welcome to bit","come");
    }
}
